Make sure the phone has at least 40% charge, and check Settings, Phone Update to make sure there isn't an update in progress (Windows Phone 8 devices that you reset and turn on will get a Windows Phone 8.1 update and you need to let that run, but put the phone into airplane mode so you don't waste time downloading any other updates).

Don't bother enabling Wi-Fi or putting in a SIM at this stage, either the phone needs to be in airplane mode for the update.) Follow the instructions that appear for setting up the phone until you get to the step about signing into or creating a new Microsoft account. That will restart the phone again and the spinning cogs will appear. Let go of the Volume Down key and then press each of these keys in order: Volume Up, Volume Down and then Power. (If you do need to reset, make sure it's charged then unplug it and power it down once it's off, hold down the Volume Down key and plug it in (which makes it restart automatically) – keep holding down Volume Down until you see an exclamation mark on screen.

If it's a secondhand phone like mine or you don't know the PIN, you can reset the phone to remove it – but you don't need to do a reset otherwise. If the phone was on an insider version of Windows, you'll need to flash it back to a retail version using the Windows Device Recovery Tool. If it's an enterprise device and USB connectivity has been disabled using a policy setting or assigned access, enable USB again. If there's a PIN on the phone, you need to turn it off before you start. If you have a phone that's already set up with your account and you just want the new OS, it's straightforward. SEE: 5G smartphones: A cheat sheet (free PDF) (TechRepublic)īut if you have a phone that's capable of running Windows 10 Mobile (which includes models like the Lumia 1520 that were never officially supported, but not devices that have only 512MB of memory), there's a little-known enterprise update tool that you can still use to do the update: the Over-the-cable updater. (If you're getting an 805a0190 error code on a Windows Phone, that's why.) The Windows Phone 8.1 Store has been turned off since December 2019, so if you have a Windows Phone that you could update to Windows 10 Mobile using the Upgrade Advisor app but didn't get around to that in time, you can't get it from the Store any more.

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